Caching, session and performance in MVC — ASP.NET Core MVC (and Razor Pages)

14. Caching, session and performance in MVC

IntermediateMediumLesson 14 of 15

csharp

builder.Services.AddOutputCache(o => o.AddPolicy("Products", b => b.Expire(TimeSpan.FromMinutes(5)).Tag("products")));
app.UseOutputCache();

[OutputCache(PolicyName = "Products")]
public IActionResult Index() => View();
// invalidate after an update: await outputCacheStore.EvictByTagAsync("products", ct);

cshtml

<cache expires-after="@TimeSpan.FromMinutes(10)" vary-by-user="true">
    @await Component.InvokeAsync("RecentOrders")
</cache>

Other levers: IMemoryCache/IDistributedCache/HybridCache for data, response compression, bundling/minification (or MapStaticAssets compression), async actions, avoiding N+1 queries in views (load everything in the controller with projections).